Harry Dresden would like you to return his staff.

lol I’m used used to pf2e and pf1e were drowning kills, a lot.

Also that’s hilarious that it actually works. 5e is such a good time.

How long can your knight hold its breath and how much fire damage are you doing per round? I think you may run out of air first. Definitely an interesting idea if it’s already hurt.

May I also recommend rogue trader from owl cat. Its warhammer universe but also really good from the beta

Traveller seems like it would be fun with the right group

Typically they heal from necrotic energy instead of positive like living things. So a healing potion for a lich is effectively a vial of pain juice for something living.